Seasonal organization of tintinnid community by temperature preference and LOD size-class in a subtropical brackish embayment

Author:

Li Jingyuan12345,Du Ping6ORCID,Li Haibo1234,Zhao Yuan1234,Mao Ming67,Zhao Li1234,Dong Yi1234,Xu Yepeng67,Grégori Gérald89,Zhang Wuchang1234ORCID

Affiliation:

1. CAS Key Laboratory of Marine Ecology and Environmental Sciences , Institute of Oceanology, , 7 Nanhai Rd, Shinan District, Qingdao, Shandong Province 266071 , P. R. China

2. Chinese Academy of Sciences , Institute of Oceanology, , 7 Nanhai Rd, Shinan District, Qingdao, Shandong Province 266071 , P. R. China

3. Laboratory for Marine Ecology and Environmental Science , Qingdao Marine Science and Technology Center, 168 Wenhai Middle Rd, Jimo District, Qingdao, Shandong Province 266237 , P. R. China

4. Center for Ocean Mega-Science, Chinese Academy of Sciences , 7 Nanhai Rd, Shinan District, Qingdao, Shandong Province 266071 , P. R. China

5. University of Chinese Academy of Sciences , 1 Yanqihu East Rd, Huairou District, Beijing 101408 , P. R. China

6. Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources , 36 Baochubei Rd, Xihu District, Hangzou, Zhejiang Province 310012 , P. R. China

7. Key Laboratory of Nearshore Engineering Environment and Ecological Security of Zhejiang Province , 36 Baochubei Rd, Xihu District, Hangzou, Zhejiang Province 310012 , P. R. China

8. Aix-Marseille University , Toulon University, CNRS, IRD, , 163 Avenue de Luminy - Bâtiment Méditerranée, 13288 Marseille cedex 09 , France

9. Mediterranean Institute of Oceanography UM110 , Toulon University, CNRS, IRD, , 163 Avenue de Luminy - Bâtiment Méditerranée, 13288 Marseille cedex 09 , France

Abstract

Abstract Most annual studies of tintinnid and phytoplankton in coastal habitats are influenced by alien species introduced by water masses exchange, and therefore cannot be used as direct evidence for exploring the mechanism of annual succession in indigenous community. For brackish communities, very limited annual studies exist because of the difficulty of conducting stable sampling in the transition between freshwater and seawater. The special topography of Xiangshan Bay isolates the external water mass and provides a suitable habitat for exploring the annual succession mechanism of the brackish tintinnid community. In this study, samples were collected from seven stations in Tie Harbor, Xiangshan Bay (East China Sea) during 10 months from 2022 to 2023. A total of 23 tintinnid species of five genera were identified throughout the year. These tintinnid species can be clustered into four seasonal groups, winter, summer, autumn and spring-autumn, with three temperature preferences. The Lorica Oral Diameter (LOD) size-class of each tintinnid species, which determines the food item size of tintinnid, separated their different ecological niches within each seasonal group. The seasonal succession of tintinnid community in Xiangshan Bay was organized by both temperature preference and LOD size of the tintinnid species.

Funder

National Key Research and Development Program of China

Natural Science Foundation of Zhejiang Province

CNRS-CAS International Research Project-Dynamics and Function of Marine Microorganisms

Insight from Physics and Remote Sensing

Project of State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography

Project of Long-term Observation and Research Plan in the Changjiang Estuary and Adjacent East China Sea

Publisher

Oxford University Press (OUP)

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